<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home', name: '' }">
        首页
      </el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card shadow="always">
      <el-alert
        title="添加商品信息"
        type="info"
        effect="light"
        show-icon
        :closable="false"
        center
      >
      </el-alert>
      <el-steps
        :align-center="true"
        :active="activeIndex - 0"
        :space="200"
        direction="horizontal"
        finish-status="success"
      >
        <el-step
          v-for="(item, index) in steps"
          :key="index"
          :title="item.title"
        >
          >
        </el-step>
      </el-steps>
      <el-form
        :model="addForm"
        ref="addFormRef"
        :rules="addFormRules"
        label-width="100px"
        label-position="top"
        size="normal"
      >
        <el-tabs
          v-model="activeIndex"
          tab-position="left"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked()"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
              <el-cascader
                :options="cateList"
                v-model="addForm.goods_cat"
                expand-trigger="hover"
                clearable
                filterable
                :show-all-levels="false"
                :props="cateProps"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              v-for="item in manyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  :label="cb"
                >
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              v-for="item in onlyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
              size="normal"
            >
              <el-input v-model="item.attr_vals" size="normal" clearable>
              </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- list-type  预览方式 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button type="primary" size="small">点击上传</el-button>
              <!-- <div slot="tip">只能上传jpg/png文件,且不超过500k</div> -->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button
              class="btn_add"
              type="primary"
              size="default"
              @click="add"
            >
              添加商品
            </el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog
      title="图片预览"
      @close="previewDialogClosed"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img class="previewImg" :src="previewPath" alt="" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  created() {
    this.getCateList()
  },
  data() {
    return {
      uploadUrl: 'http://www.tangmengyu.com/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      steps: [
        { title: '基本信息' },
        { title: '商品参数' },
        { title: '商品属性' },
        { title: '商品图片' },
        { title: '商品内容' },
        { title: '完成' }
      ],
      activeIndex: 0,
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入选择商品分类', trigger: 'blur' }
        ]
      },
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      cateSelected: [],
      manyTableData: [],
      onlyTableData: [],
      previewPath: '',
      previewDialogVisible: false
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类列表失败')
      }
      this.cateList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        this.$message.error('只能选择3级分类')
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      console.log(activeName, oldActiveName)
      if (this.addForm.goods_cat.length !== 3 && oldActiveName === '0') {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    tabClicked() {
      if (this.activeIndex === '1') {
        this.getTableDatas('many')
      }
      if (this.activeIndex === '2') {
        this.getTableDatas('only')
      }
    },
    // 获取动态参数列表
    async getTableDatas(sel) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: sel }
        }
      )
      if (res.meta.status !== 200) {
        this.$message.error('获取动态列表参数列表失败!')
      }

      if (sel === 'many') {
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    // 预览事件
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 图片移除操作
    handleRemove(file, fileList) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传事件
    handleSuccess(response) {
      console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    previewDialogClosed() {
      this.previewPath = ''
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        console.log(this.addForm)
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发送请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.message)
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      } else {
        return null
      }
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0;
}
.previewImg {
  width: 100%;
}
.btn_add {
  margin: 15px 0;
}
</style>
